Patent US3955077A successfully refreshed from Google Patents.
US3955077A
Expired / Lapsed
US
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Lamp reflectors and motor vehicle lamp assemblies incorporating same
Assignee: Carello Lighting PLC
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Filing: 1974-09-27
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Granted: 1976-05-04
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Expires: 1994-09-27
Abstract
Abstract A lamp reflector comprising a dished body having a reflective inner surface, the body being elliptical in vertical axial section and having a different shape in horizontal axial section, which may be elliptical, arcuate or parabolic. The horizontal width of the body taken in a transverse vertical cross-section is greater than its vertical height. A vehicle lamp assembly comprising a reflector as defined above, a lens receiving light from the reflector, and a mask mounted between the two. The reflector and the mask or the mask alone may be movable relative to the lens.
Inventors
- 👤 Kenneth James Jones
- 👤 Robert Arthur Hargroves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:08
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/09; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/323; F21S41/40; F21S41/43; F21S41/435
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
A motor vehicle lamp assembly comprising (1) a lamp reflector comprising a dished body having a reflective inner surface, said body being elliptical in vertical axial section and having a different shape in horizontal axial section, said body also having a vertical cross section in which its horizontal width is greater than its vertical height, (2) a filament mounted in said lamp reflector, and (3) a further reflector arranged to receive light from said element, said further reflector having a reflective surface lying on a paraboloid of revolution and a focal point which lies at an outer focal point of said elliptical vertical section of said reflector body.
Claim 2
Dependent Claim
108 words
A motor vehicle lamp assembly comprising (1) a lamp reflector comprising a dished body having a reflective inner surface, said body being elliptical in vertical axial section and having a different shape in horizontal axial section, said body also having a vertical cross section in which its horizontal width is greater than its vertical height, (2) a filament mounted in said lamp reflector, and (3) a further reflector arranged to receive light from said element, said further reflector having a reflective surface lying on a paraboloid of revolution and a focal point which lies at an outer focal point of said elliptical vertical section of said reflector body.
Claim 3
Dependent Claim
16 words
The assembly according to claim 1, wherein said horizontal axial section of said body is elliptical.
Claim 4
Dependent Claim
16 words
The assembly according to claim 1, wherein said horizontal axial section of said body is arcuate.
Claim 5
Dependent Claim
16 words
The assembly according to claim 1, wherein said horizontal axial section of said body is parabolic.
Claim 6
Dependent Claim
21 words
The assembly according to claim 1, wherein said vertical axial section has an eccentricity e of between 0.40 and 0.75 inclusively.
Claim 7
Dependent Claim
17 words
The assembly according to claim 5, wherein said vertical axial section has an eccentricity e of 0.60.
Claim 8
Dependent Claim
132 words
A motor vehicle lamp assembly comprising (1) a lamp reflector comprising a dished body having a reflective inner surface, said body being elliptical in vertical axial section and having a different shape in horizontal axial section, said body also having a vertical cross section in which its horizontal width is greater than its vertical height, (2) a filament mounted in said lamp reflector, and (3) a further reflector arranged to receive light from said element, said further reflector having a reflective surface lying on a paraboloid of revolution, a mask being mounted between said lamp reflector and said further reflector at a focal point of the latter, said mask being stepped and disposed to provide a sharp, stepped cut-off for the top of a beam projected by the lamp assembly in use.
Claim 9
Dependent Claim
132 words
A motor vehicle lamp assembly comprising (1) a lamp reflector comprising a dished body having a reflective inner surface, said body being elliptical in vertical axial section and having a different shape in horizontal axial section, said body also having a vertical cross section in which its horizontal width is greater than its vertical height, (2) a filament mounted in said lamp reflector, and (3) a further reflector arranged to receive light from said element, said further reflector having a reflective surface lying on a paraboloid of revolution, a mask being mounted between said lamp reflector and said further reflector at a focal point of the latter, said mask being stepped and disposed to provide a sharp, stepped cut-off for the top of a beam projected by the lamp assembly in use.
Claim 10
Dependent Claim
16 words
The assembly according to claim 7, wherein said horizontal axial section of said body is elliptical.
Claim 11
Dependent Claim
16 words
The assembly according to claim 7, wherein said horizontal axial section of said body is arcuate.
Claim 12
Dependent Claim
16 words
The assembly according to claim 7, wherein said horizontal axial section of said body is parabolic.
Claim 13
Dependent Claim
21 words
The assembly according to claim 7, wherein said vertical axial section has an eccentricity e of between 0.40 and 0.75 inclusively.
Claim 14
Dependent Claim
17 words
The assembly according to claim 11, wherein said vertical axial section has an eccentricity e of 0.60.
Claim 15
Dependent Claim
37 words
The assembly according to claim 7, wherein said lamp reflector and said stepped mask are adapted to be displaced relative to said further reflector to enable dipping of the beam projected by the headlamp assembly in use.
Claim 16
Dependent Claim
32 words
The assembly according to claim 7, wherein said mask is mounted for movement relative to said lamp reflector and said further reflector to modify a cut-off line of said beam in use.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |